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09-08-2020, 12:02 PM
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#1
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Established Member
Join Date: Jun 2020
Location: Parker
Posts: 30
M.O.C. #26528
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Black Waste Seeping
I have a 2020 3930. It has 2 black and grey tanks and one fresh.
Every time I'm done with camping I goto dump station and when I open the cap it seems to have back pressure, about 1/4 of Black waste comes out. The tech told me to hold my valves closed longer as they are the cable system and need a few more seconds to make sure they are closed. I dont believe this is the isssue since I have a build up of pressure when cap is opened.
Last time cap was removed was at same place of storage.
Ideas? I'm going to record this next time but thought I'd ask here as well. Thanks
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09-08-2020, 12:29 PM
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#2
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Montana Master
Join Date: Jun 2018
Location: Carson City
Posts: 2,017
M.O.C. #21963
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The cable style valves are not very efficient. It won't be long and they will stick or break all together. Replace with a solid rod style valve and or purchase the shut off valve that mounts to the end of your sewer pipe as a last line of defense.
__________________
2016 3160, Legacy, Sailuns, Splendide 2100 xc vented, 1 1/2" axle lift blocks, disk brakes. 2014 Ram 3500 SRW SWB 4X4 6.7 Aisin Mega Cab, EBC slotted disks and brakes, Titan fuel tank.
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09-08-2020, 01:33 PM
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#3
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,717
M.O.C. #4831
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Quote:
Originally Posted by Sharko
I have a 2020 3930. It has 2 black and grey tanks and one fresh.
Every time I'm done with camping I goto dump station and when I open the cap it seems to have back pressure, about 1/4 of Black waste comes out. The tech told me to hold my valves closed longer as they are the cable system and need a few more seconds to make sure they are closed. I dont believe this is the isssue since I have a build up of pressure when cap is opened.
Last time cap was removed was at same place of storage.
Ideas? I'm going to record this next time but thought I'd ask here as well. Thanks
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1/4 of what? A cup, a bucket, a tank? If it is a cup, that is normal stuff left in the lines when you dump. Get a Valterra twist on gate valve for the end of your sewer pipe and stop the surprises when you remove the cap.
If it is a bucket or more, change the valve.
__________________
Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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09-08-2020, 03:22 PM
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#4
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Montana Master
Join Date: Jan 2018
Location: Granger TX
Posts: 2,611
M.O.C. #21044
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Here is a pic of my Valtera valve on the end of the outlet.
The valve on one of my black tanks will not close 100% and I think there is some debris keeping it from completely closing. Replacing that valve is on my list of to-do's
item 18. - replace black tank valve for front tank
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MikenDebbie Aggie ‘77 in the sticks near Austin TX
2019 Chevy 3500 High Country DRW
2018 Montana 3921FB
Aussie Gus + Texas Heeler Jimmy
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09-08-2020, 03:29 PM
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#5
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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All of our campers, over the years, have had a surprise for me when I took the cap off. When I would dump there would still be areas in the drain system that held water etc. Once I drove down the road that material would head for the drain opening. About 16 years ago we started adding a knife valve at the end of the drain and I haven't had a surprise since.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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